SUSTAINED WINDS: The wind speed obtained by averaging the observed values over a one minute period.
SWELLS: Ocean waves of regular and longer duration than wind waves.
Sustained Wind Wind speed determined by averaging observed values over a 2-minute period. Severe WEAther Threat Index (SWEAT Index) A stability index developed by the Air Force which incorporates instability, wind shear, and wind speeds.
Sustained wind speeds of 40 mph or greater lasting for 1 hour or longer, or winds of 58 mph or greater for any duration.
High Wind Advisory ...
Sustained wind or frequent gusts to 35 miles an hour or greater; and
Considerable falling and/or blowing snow (i.e., reducing visibility frequently to less than ¼ mile) ...
GALE FORCED - Sustained winds from 38 to 54 MPH. If a tropical cyclone is involved, the term TROPICAL STORM is used and its upper limit for the winds is extended to 73 MPH.
Beaufort force 5. Sustained wind speeds in the range of 17 to 21 knots. Moderate waves, taking a more pronounced long form; many white horses are formed (chance of some spray).
Front
The boundary between two different air masses.
Wind Advisory- Sustained winds 25 to 39 mph and/or gusts to 57 mph.
Wind Chill Advisory- Issued when wind chill temperatures are expected to be 10 to 24F below zero for an extended period of time.
High Wind- the sustained wind of forty mph or greater and/or gust greater than fifty-eight mph.
Horse Latitudes- subtropical regions where anticyclones produce settled weather.
Humidity- the amount of water vapor present in the air.
BlizzardIncludes winter storm conditions of sustained winds or frequent gusts of 35 mph or more that cause major blowing and drifting of snow, reducing visibility to less than one-quarter mile for 3 or more hours.
* Eastern (ME..SC, Lake Erie, Lake Ontario) - Sustained winds or frequent gusts ranging between 25 and 33 knots (except 20 to 25 knots, lower threshold area dependent, to 33 knots for harbors, bays, etc.) and/or seas or waves 5 to 7 feet and greater, ...
Inland Hurricane WarningIssued for interior counties that sustained winds of 74 mph or greater associated with a hurricane are expected within 24 hours.
Hurricane Force Wind WarningA warning for sustained winds, or frequent gusts, of 64 knots (74 mph) or greater, either predicted or occurring, and not directly associated with a tropical cyclone.
The most intense storm on record was Typhoon Tip in the northwestern Pacific Ocean in 1979, which reached a minimum pressure of 870 mbar (25.69 inHg) and maximum sustained wind speeds of 165 knots (85 m/s) or 190 miles per hour (310 km/h).
Hight Wind Warning: Sustained winds of at 40 mph or gusts of 50 mph or greater are expected to last at 1 hour.
Hoar Frost: Crystalline ice which forms on surfaces that are below freezing. Appear like feathers, needles, leaves, ferns.
Hurricanes are cyclones that develop over the warm tropical oceans and have sustained winds in excess of 64 knots (74 miles/hour).
A tropical depression of sufficient intensity to produce sustained gale force winds (sustained winds of 63 km/h or greater with gusts in excess of 90 km/h).
Great Lakes Storm Summary (Product Header CLEGLSCLE): These summaries will be issued by NWFO Cleveland, Ohio as soon as sustained winds of 50 knots or more are produced by any synoptic scale storm when such winds are expected to continue on any ...
Sustained winds in excess of gale force (more than 63km/h) lashed Adelaide and the southern coast of South Australia for 12 hours.
Hurricane warning: A warning that sustained winds 64 kt (74 mph or 119 kph) or higher associated with a hurricane are expected in a specified coastal area in 24 hours or less.
A warning that sustained winds 64 kt (74 mph or 119 kph) or higher associated with a hurricane are expected in a specified coastal area in 24 hours or less.
A hurricane which reaches Category 3 (sustained winds greater than 110 mph) on the Saffir/Simpson Hurricane Scale.
NOAA National Weather Service - Cite This Source - This Definition ...
HURRICANE The name for a tropical cyclone with sustained winds of 74 miles per hour (65 knots) or greater in the North Atlantic Ocean, Caribbean Sea, Gulf of Mexico, and in the eastern North Pacific Ocean.
High Wind Warning - Issued when sustained winds of 40 mph or greater are occurring or expected to persist for an hour or longer or if winds of 58 mph or greater are expected for any duration.
Blizzard- A severe snow storm featuring sustained winds of more than 32 miles per hour, temperatures 10 degrees Fahrenheit or lower, and visibility of 500 feet or less.
An eye will usually develop when the maximum sustained wind speeds exceed 78 mph. It can range in size from as small as 5 miles to up to 60 miles, but the average size is 20 miles.
Hurricane Warning - A warning issued when sustained winds of 119 kilometers per hour or higher are expected within a specified coastal area in 24 hours or less.
A tropical cyclone in the western hemisphere that has sustained wind speeds of 74 miles per hour or greater
Hydrological Cycle ...
Tropical depression An early stage in the development of a hurricane; sustained winds are at least 37 km (23 mi) per hour but less than 63 km (39 mi) per hour.
HURRICANE: An intense tropical cyclone in the North Atlantic, Caribbean Sea, Gulf of Mexico and the Eastern Pacific Ocean with sustained wind speeds in excess of 74 mph (64 knots).
These storms usually have a radius of maximum winds that is larger than what is observed in purely tropical systems, and their maximum sustained winds have not been observed to exceed about 32 m s-1 (64 knots).
Special Marine Warning
A warning for hazardous weather conditions, usually short and not adequately covered by existing marine warnings. Such conditions include sustained winds or gusts of 35 knots or more for 2 hours or less.
Tropical cyclones with sustained winds above 73 miles per hour are known as hurricanes in the North Atlantic Ocean, Caribbean Sea, Gulf of Mexico and the Eastern North Pacific (east of the date line) and cyclones in the Indian Ocean.
 See also: Storm, Water, Weather, Pressure, Cyclone
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